At least initially they had 1500 engines. Later updated to the 1600. 

> On May 1, 2018, at 5:18 PM, Tom Buese <tantonbz@GMAIL.COM> wrote:
> 
> T3 cars, not 3rd generation buses, came into the US about 64-65+-, but were in Europe in about 62-63, & had a 1500 cc pancake engine in them, IIRC. No idea on the Bay window engine sizes as I was never a Bay window aficionado.
> 
> 
>> On May 1, 2018, at 5:09 PM, ddbjorkman@verizon.net <ddbjorkman@VERIZON.NET> wrote:
>> 
>> Hi Jim.  Not sure when VW changed from the "beetle" type of engine to the later one they used in the fastback and squareback vehicles of the time. On second look though, a 1600cc engine was probably the upright.  Not sure if there was a difference in cc's in the later engine. Maybe it was the 1800?  I can't remember the minutia.  That later engine used in the last few years of the Bay's was a hot little engine that didn't seem to mind upgrades.  I believe that is where the old story that it was a "de-tuned" Porsche engine came from. 
>> 
>> Dave B.
>> 
>> 
>> 
>> -----Original Message-----
>> From: Jim. Felder <jim.felder@gmail.com>
>> To: ddbjorkman <ddbjorkman@verizon.net>
>> Cc: vanagon <vanagon@gerry.vanagon.com>
>> Sent: Tue, May 1, 2018 12:33 pm
>> Subject: Re: 1971 on Bring a Trailer for sale
>> 
>> 
>> 
>> I **think** "upright engine" refers to the fan layout (vertical fan and blower housing) and not the cylinder layout (flat four for all VW air-cooled). I know my 69 had the "traditional" layout with the vertical fan attached to an alternator, like a beetle. Later buses had the flat fan.
>> 
>> 
>> Jim
>> 
>> 
>> On Tue, May 1, 2018 at 11:27 AM ddbjorkman@verizon.net <ddbjorkman@verizon.net> wrote:
>> 
>> There's a flat four in this beast, according to the seller.  A replacement, no doubt.
>> 
>> Dave B.
>> 
>> 
>> 
>> -----Original Message-----
>> From: Roy Nicholl <RNicholl@NBNET.NB.CA>
>> To: vanagon <vanagon@GERRY.VANAGON.COM>
>> Sent: Mon, Apr 30, 2018 12:05 pm
>> Subject: Re: 1971 on Bring a Trailer for sale
>> 
>> One of my favourite bread box years …. you still have the upright engine, but have disk brakes on the front.
>> 
>>> On 30-Apr-2018, at 12:09, Roger Whittaker <rogerwhitt1@GMAIL.COM> wrote:
>>> 
>>> https://bringatrailer.com/listing/1971-volkswagen-bus-3/?utm_source=dailymail&utm_medium=email&utm_campaign=2018-04-30
>>> 
>>> --
>>> roger whittaker 604.414.6266
>>> 
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